. >> iran has a new president, hassan rohani, who has officially replaced mahmoud ahmadinejad. nearly two months after the ballot the new iranian president promised he would try his best to elevate iran's position and lift international sanctions. he is set to take the oath in parliament on sunday. >> the official seal of approval from supreme leader ali khamenei was endorsed by iran's highest authority saturday, taking office the country's new president and succeeding mahmoud ahmadinejad. speaking of the ceremony, rohani's watch word was moderation. >> the country is in need of national resolve. the distance of extremism and policymaking in governments and focuses on the rule of law and upholding the law. the dialogue and plan that was set out during the elections and received a majority vote was this -- moderation and tolerance. >> among the challenges rohani now faces is the issue of political prisoners. at least 800 are currently behind bars for challenging the country's leadership, including prominent opposition figure masavi. human rights activists and feminists are also